#include<stdio.h>

#define M 10

int main()
{
   printf("hello c!,%d\n",M);
  // printf("hello c1\n");
  // printf("hello c2\n");
  // printf("hello c3\n");
   printf("hello c4\n");
   printf("hello c5\n");
   printf("hello c6\n");
#ifdef DEBUG 
   printf("this is debug!\n");
#else
   printf("this is release\n");
#endif 
   return 0;
}
